Me encanta como la gente te j0de solo porque hablas español.
Te recomiendo que hagas una solicitud en la parte de "Support" justo al lado de "account", (donde sale tu username en la parte superior derecha), allí puedes llenar una solicitud (donde puedes hasta colocar el idioma) que supuestamente llega a los admins. Espero ayude.
Correct translation:
Hello, I wanted to ask a question, I don't know how to contact Riot or someone of the server. The thing is, I was just playing ranked with Miss Fortune and I was winning, we were destroying the last nexus turret and just at that time it disconnects, I don't know why because my internet was working, but it didn't reconect, and I had to leave. What can you do? Because it's a won ranked that disconnected two seconds before winning and it doesn't want to show up. When you leave a game they put you at least "Leave", but it was already won, Thanks!